Photographic camera

ABSTRACT

A changeable focal length photographic camera which may operate in either a real focal length photographing mode or a pseudo focal length photographing mode. A light shielding device shields a portion of the film to be exposed when the pseudo focal length photographing mode is selected.

This application is a divisional of application Ser. No. 348,075, filedMay 5, 1989, which is a continuation of Ser. No. 939,706, filed Dec. 9,1986, now abandoned.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention generally relates to photography and moreparticularly, to a photographic camera by which an object to bephotographed can be taken in a pseudo focal length photographing mode aswell as in a real focal length photographing mode. In the pseudo focallength photographing mode, a narrower scope for printing is specifiedthan that in the real focal length photographing mode.

2. Description of the Prior Art

Conventionally, there have been proposed various kinds of thephotographic cameras each of which is provided with the photographinglens having changeable focal length and accordingly, a large number ofsuch photographic cameras have been on sale, as products. In thephotographic cameras of such kinds, however, a changeable ratio in thefocal length is restricted to approximately 1.6 to 1.8 times for thepurpose of preventing the camera from being formed in a large size,simplifying a mechanism for changing the focal length, simplifying thedesign and production of the photographing lens and preventing thecamera from being manufactured at a high cost. Consequently, users arenot satisfied with the aforementioned changeable ratio, since the effectobtained by changing the focal length is not fully recognized.

On the other hand, the Japanese Patent Laid-open Publication (Tokkaisho)No. 54-26721 discloses a photographic camera having a real focal lengthphotographing mode and a pseudo focal length photographing mode tothereby specify a scope for printing narrower than the scope in the realfocal length photographing mode, in which camera an information fortrimming, that is, a pseudo focal length photographing informationrelated to the trimming process is recorded on a film used in the casewhere the pseudo focal length photographing mode is selected. A methodcalled trimming in the field of photography is the method in which onlya desired area of an image recorded on a frame is printed withenlargement. The camera of this kind is so constructed that the trimminginformation (information indicating that the pseudo focal lengthphotographing mode is selected) is printed at the upper or lower portionof the film within a range other than the range to be photographed.

In this camera, although the focal length of the photographing lens cannot be switched, it is capable of recording onto a film used, a signalsignifying whether or not the print is requested with enlargement in amagnification larger than the ordinary magnification, through thetrimming process with respect to the desired portion of the frame of thefilm which has been photographed. In the case where the film which hasbeen photographed by such camera is printed, the print in compliancewith a photographer's intention can be obtained in a manner that themagnification for enlargement is altered by reading the signals recordedon respective frames of the film. By employing such camera, it iscapable of obtaining without any switching of the focal length of thephotographing lens, through the trimming photography, i.e., thephotography in the pseudo focal length photographing mode, the printsimilar to the print which is obtained through the photographing in thelong focal length mode by the photographic camera with the changeablefocal lengths. Accordingly, by the photographic camera enabling thetrimming photography as disclosed in the aforementioned Publication,since it is not necessary to provide the mechanism for changing thefocal length, unlike the focal length changeable camera, thephotographic camera having a simple and compact construction can bemanufactured advantageously at a low cost.

In the photographic camera that permits to photograph in the pseudofocal length photographing mode, however, since the enlargement isexecuted in the magnification larger than the ordinary magnificationwhen the photographing in the pseudo focal length photographing mode hasbeen executed, there is inevitably a limit for the possiblemagnification for enlargement in view of particle characteristics of thefilm, distance measuring performance of a distance measuring device andoptical properties of the photographing lens, and consequently, themagnification is restricted to approximately 2 to 4 times at the utmostin the case where the magnification for enlargement is converted intothe magnification in an equivalent focal length of the photographinglens.

With respect to the film on which the pseudo focal length photographinginformation is printed, since various kinds of data are formed as latentimages thereof on the film or the portion of the film on which thepseudo focal length photographing information is printed is the portionon which various data are printed or notches are formed in a developingprocess, the developing system is subjected to an undesired influence.Furthermore, there has been such a possibility that the pseudo focallength photographing information is lost in the case where the notchesare formed on the film in the developing process.

In addition, a correspondence can not be readily made between the printand a negative through respective views thereof, since the pseudo focallength photographing information is printed at the end portion otherthan the portion on which the image is formed. This is because only apart of the frame of the negative is printed and also, the informationindicative of this fact is located at the position to be recognized withdifficulty.

In the aforegoing focal length changeable camera, although there hasbeen such an advantage that the photographing can be executed in a largemagnification of the image in the case where the photographing lens isset to the longer side in focal length, a shortest distance up to theobject for close-up photography is determined, in the photographiccamera enabling an automatic adjustment of the focusing position inaccordance with a result detected by an automatic focus detectingdevice, by the range of distance which can be measured by the automaticfocus detecting device or by the range of the distance which can beadjusted by an automatic focus adjusting device, and as a result, nophotographing can be executed in a magnification larger than thatobtained by the above described camera.

Moreover, the focal length changeable camera is also known, for example,in the Japanese Utility Model Laid-Open Publication (Jikkaisho) Nos.59-164037 and 59-164043, and in the Japanese Patent Laid-OpenPublication (Tokkaisho) Nos. 59-191020 and 59-195601, or the like.

SUMMARY OF THE INVENTION

Accordingly, the present invention has been developed with a view tosubstantially eliminating the above described disadvantages inherent inthe prior art photographic camera and has for its essential object toprovide an improved photographic camera in which the pseudo focal lengthphotographing information or informations can be correctly read in thedeveloping process.

Another important object of the present invention is to provide aphotographic camera of the above described type that permits thephotographing in a magnification larger than the magnification obtainedby the close-up photography at the aforementioned shortest distance upto the object, with the photographing lens being set at the long side infocal length.

A further object of the present invention is to provide a photographiccamera of the above described type which is simple and compact inconstruction and is provided with the photographing lens changeable infocal length, and in which the changeable magnification of theequivalent focal length showing up in the print can be increased ascompared with that of the conventional camera, by means of thecombination of the changeable magnification of the focal length and theenlargement magnification in printing the film taken in the pseudo focallength photographing mode.

In accomplishing these and other objects, according to one preferredembodiment of the present invention, there is provided a photographiccamera mounting thereon a photographing lens having changeable focallengths of at least two kinds of a long focal length and a short focallength, and by which camera an object to be photographed can be taken ineither real focal length photographing mode or pseudo focal lengthphotographing mode. In the pseudo focal length photographing mode, anarrower scope for printing is specified than that in the real focallength photographing mode. The photographic camera includes means forchanging the focusing position of a photographing optical system, aselecting means for selecting either of the real focal lengthphotographing mode and a close-up mode required for close photography,and a setting means for setting the photographing optical system to alonger side in focal length and also for setting the object distancerequired for photographing to its shortest distance, in the case wherethe close-up mode is selected.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other objects and features of the present invention willbecome apparent from the following description taken in conjunction withthe preferred embodiment thereof with reference to the accompanyingdrawings, throughout which like parts are designated by like referencenumerals, and in which:

FIG. 1 is a perspective view of a photographic camera according to onepreferred embodiment of the present invention;

FIG. 2 is a top plan view of a finder portion and a printing portion fora pseudo focal length photographing information in the case where apseudo focal length photographing mode is selected:

FIG. 3 is a rear view of FIG. 2, with a back cover being opened;

FIG. 4 is a view similar to FIG. 2 in the case where a real focal lengthphotographing mode is selected;

FIG. 5 is an elevational view of a photographing lens control mechanismin one of the modes other than a close up mode;

FIG. 6 is a view similar to FIG. 5 in the close-up mode;

FIGS. 7 and 8 are views similar to FIGS. 5 and 6 respectively, whichparticularly show modifications thereof;

FIGS. 9a through 9d are schematic views illustrating plural kinds ofdisplaying states of a liquid crystal display unit mounted on thephotographic camera of the present invention;

FIG. 10 is a graph showing various combinations between variations ofthe focal length of the photographing lens and the fact whether or notthe pseudo focal length photographing mode is designated;

FIGS. 11a through 11d show various locations of the film on each ofwhich the pseudo focal length photographing information is recorded;

FIG. 12 is an elevational view of a distance measuring unit showing anarrangement of light receiving elements;

FIG. 13 is a block diagram showing an electric circuit contained in thephotographic camera of the present invention;

FIG. 14 is a graph showing changes of output signals of code platescaused by a sliding of a slide brush;

FIG. 15 is a circuit diagram showing a specific construction of one ofpulse generators shown in FIG. 13;

FIG. 16 is a circuit diagram showing a specific construction of one-shotcircuit shown in FIG. 13;

FIG. 17 is a graph showing an exposure control program according to theembodiment of the present invention;

FIG. 18 is a waveform, in accordance with which a shutter of thephotographic camera is opened and closed;

FIGS. 19a and 19b which are continuous onto each other, are a flow-chartillustrating a switching of the photographing mode;

FIG. 20 is a flow-chart illustrating a back cover routine, and

FIGS. 21a, 21b and 21c which are continuous onto one another, are aflow-chart illustrating an exposure routine, winding routine andrewindng routine.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring now to the drawings, there is shown in FIG. 1, a photographiccamera according to one preferred embodiment of the present inventionwhich is provided with a switching lever 1 for selectively changing overa photographing mode to another in a plurality of photographing modes, amovable lens barrel 2, a couple of range finder windows 3 and 4 forautomatically detecting a distance to an object to be photographed, aview finder 5, an electronic flash 6, a liquid crystal display unit(referred to as LCD for brevity's sake hereinafter), a frame-counterwindow 8, a shutter release button 9 and a light receiving window fordetecting intensity of incidentlight passing therethrough. In the cameraof this type, it is capable of selecting one of four modes, i.e. "WIDE"(a wide-angle mode), "STANDARD" (a standard mode), "TELE" (a telephotomode) and "CLOSE UP" (a close-up mode) by operating the switchinglever 1. When either of the telephoto mode and the close-up mode hasbeen selected, that is, the switching lever 1 has been selectively setat either of "TELE" and "CLOSE UP", the movable lens barrel 2 protrudesfrontwards from the camera body so that the photographing lens ischanged over so as to have a long focal length.

In FIG. 2, a finder portion of the camera and a printing portion thereoffor a pseudo focal length photographing signal are schematicallyillustrated as viewed from above, in the close-up mode for the close-upphotography. A finder zoom motor 11 is so provided in the camera as tochange over a firder magnification and its rotation is transmitted to arack plate 16 through a pinion gear 12, a couple of reduction gears 13and 14 and an idle gear 15. The rack plate 16 is reciprocably so guidedas to cross an optical axis XF of the finder through the rotation of theidle gear 15.

Each of a set of finder zoom lenses 30 and 31 is provided with a pin forbeing engaged in a cam groove 16a and 16b formed in the rack plate 16,respectively. When the rack plate 16 is caused to move in a directionrequired to cross the optical axis XF of the finder, since both of thezoom lenses 30 and 31 are supported so as to be movable only in an axialdirection of the optical axis XF of the finder, they are caused to movein the aforementioned direction in accordance with the movement of thecam grooves 16a and 16b to execute a zooming of the finder. The findersystem is further provided with a code plate 17 having 2 bits of Graycodes to monitor a zooming state of the finder, a code reading brush 18for reading the Gray codes, a finder objective lens 19, a couple offinder prisms 20 and 32, and a finder eyepiece 33.

There are also provided a finder field mask 40 having an opening portiondefined therein with the optical axis XF of the finder as the centerthereof, and a switching lever 34 of the pseudo focal lengthphotographing signal having one arm portion urged in a clockwisedirection with a rotary axis 35 as the center thereof so as to be heldin contact at its end with a bent portion 16c of the rack plate 16 andthe other arm portion caused to push, at its end, a mask 36 of thepseudo focal length photographing signal urged in a counterclockwisedirection. The mask 36 of the pseudo focal length photographing signalis so designed as to enter within a photographing range for a filmlocated at the position required for photographing in order to shield apart of light rays for photographing, with the position to be shieldedbeing set at the location not to be printed in the case where the pseudofocal length photographing mode is selected. The mask 36 of the pseudofocal length photographing signal is rotatable around its rotary axis 37and there are disposed in the vicinity of this rotary axis 37, a lightemitting diode (referred to as LED for brevity's sake hereinafter) 38for printing use of the pseudo focal length photographing signal and alens 39 for the same use. By the construction as described above, thelight emitted from the LED 38 for printing use of the pseudo focallength photographing signal is collected through the lens 39 and afterhaving been reflected on the mask 36 a single time, it reached the film41, thus resulting in that the pseudo focal length photographing signalis printed on the film located at the position required forphotographing.

FIG. 3 is a rear view of the camera as viewed from the rear side thereofin the state shown in FIG. 2. In FIG. 3, an opening 42 for printing useof the pseudo focal length photographing signal is defined in the mask36 in order that the light emitted from the LED 38 reaches the filmthrough the opening 42. As a result, the pseudo focal lengthphotographing signal is printed in the form corresponding to the opening42 within an image plane to be photographed which is shielded from thelight by the mask 36 and a readily distinguishable signal is, therefore,printed on the image plane.

FIG. 4 is a top plan view of the finder portion and the printing portionof the pseudo focal length photographing signal, showing a state inwhich the switching lever 1 as shown in FIG. 1 is set at "WIDE" in thewide-angle mode, i.e., in a short focal length mode. In this case, sincethe mask 36 is caused to be away from a photographing light path of thephotographing lens, neither the film is shielded from the light nor thepseudo focal length photographing signal is printed.

FIG. 5 is a front view of a control mechanism of the photographing lensin the case where the switching lever 1 as shown in FIG. 1 is set at"TELE" in the telephoto mode, i.e., in a long focal length mode. In FIG.5, there is provided a circular frame 47 for controlling the position ofthe photographing lens in the axial direction of the optical axis. Whenthe circular frame 47 is caused to rotate in a counterclockwisedirection, the lens is shifted towards the object side for focusing tofarther object. A holding lever 45 having one end 45a hooked and theother end covered with an armature 45b thereon is disposed in thevicinity of the circular frame 47 so as to be urged by a spring 44 in aclockwise direction in order to hold the circular frame 47 by its hookedholding portion 45a through engagement thereof with a projection 47bformed on the circular frame 47. A release magnet 43 is disposed closeto the armature 45b on the holding lever 45 and at the instance when therelease magnet 43 is supplied with electric power to attract thearmature 45b thereto, the holding portion 45a of the holding member 45is disengaged from the projection 47b of the circular frame 47 throughrotation of the holding lever 45 around its rotary axis 46 in acounterclockwise direction, thus resulting in that the circular frame 47is rotated in a clockwise direction by a spring 55 through a bar 47adisposed on the circular frame 47.

When the circular frame 47 rotates to a location corresponding to anin-focus position relating to an object from which the distance has beendetected, a stop magnet 48 for restricting the rotation of the circularframe 47 is deenergized to stop it in a manner that a stop lever 50having one end hooked and the other end covered with an armature 50b,which has been kept attracted by the stop magnet 48, is rotated in aclockwise direction by a spring 49 and thereafter, a holding portion 50aformed on one end of the stop lever 50 is caused to engage with eitherof a large number of claw members disposed on the outer periphery of thecircular frame 47. For this end, the stop lever 50, the stop magnet 48and the spring 49 are substantially the same both in construction and inarrangement as the holding member 45, the release magnet 43 and thespring 44. The large number of the claw members formed on the circularframe 47 are composed, for use in an automatic focusing adjustablerange, of a claw member 47d engaged with the stop lever 50 in the casewhere the circular frame 47 is caused to stop at a positioncorresponding to the shortest focusing distance, a claw member 47eengaged with the stop lever 50 in the case where the circular frame 47is caused to stop at a position corresponding to the longest focusingdistance, and the other claw members formed between the aforementionedones 47d and 47e, each engaged with the stop lever 50 in the case wherethe circular frame 47 is caused to stop at a position corresponding toan intermediate position between the shortest and the longest focusingdistances. A charge member 54 is so disposed as to restore thephotographing lens to the primary position where the holding portion 45aof the holding member 45 and the projection 47b of the circular frame 47are engaged with each other.

There is provided a close-up lever 52 having one arm portion 52a held incontact with either of a stopper 56b and a pin 1a disposed on theswitching lever 1, and the other arm portion 52b for restricting themovement of the circular frame 47 through engagement thereof with theprojection 47b formed on the circular frame 47. More specifically, theclose-up lever 52 is controlled in the counterclockwise rotation thereofby the pin 1a of the switching lever 1 and in either of thephotographing modes other than the close-up mode, as shown in FIG. 5,since the close-up lever 52 is not pushed by the pin 1a, the close-uplever 1 is caused to be held in contact at its arm portion 52a with thestopper 56b by being resiliently urged by a spring 57.

FIG. 6 is a front view of the control mechanism of the photographinglens in the case where the switching lever 1 as shown in FIG. 1 is setat "CLOSE-UP" in the close-up mode. When the switching lever 1 isbrought to the "CLOSE-UP" position from the state as shown in FIG. 5 bybeing rotated in the counterclockwise direction, the close-up lever 52is rotated in the counterclockwise direction by the pin 1a of theswitching lever 1. Although the rotation of the close-up lever 52 isinterrupted at the position where the arm portion 52b thereof has beenbrought in contact with the stopper pin 56a, the arm portion 52a of theclose-up lever 52 becomes to be bent to some extent due to resiliency ofits own, when the close-up lever 1 is rotated to the "CLOSE-UP"position. In this state, the other arm portion 52b of the close-up lever52 enters within a movable range of the projection 47b formed on thecircular frame 47. Consequently, although the circular frame 47 startsto rotate in the clockwise direction at the time when the circular frame47 is disengaged at its projection 47b from the holding member 45 byenergizing the release magnet 43, the rotation of the circular frame 47is immediately interrupted due to the fact that the close-up lever 52 isbrought in contact, at its arm portion 52b, with the projection 47b ofthe circular frame 47. The photographing lens, in this case, is shiftedby a predetermined amount less than an amount in the case where thephotographing lens is interrupted when the stop lever 50 is engaged withthe claw member 47d for the shortest focusing distance in the automaticfocusing adjustable range and accordingly, it is capable of focusing thephotographing lens to an object located at a distance closer than adistance within the ordinary automatic focusing adjustable range.

It is to be noted here that in the close-up mode as shown in FIG. 6, theclose-up photography may be executed in a manner that the holding lever45 is locked at its end portion by the arm portion 52b of the close-uplever 52 without any retreat of the photographing lens towards thecamera body, that is, with the photographing lens being kept in acompletely shifted state.

It is also to be noted that the close-up photography may be executed ina manner that the photographing lens is kept in the completely shiftedstate without energizing the release magnet 43.

FIGS. 7 and 8 are front views of the control mechanism of thephotographing lens showing a modification thereof. In this modification,when the circular frame 47 is rotated in the clockwise direction, thephotographing lens is shifted to the object side. In FIG. 7, since theswitching lever 1 is set to "TELE", one of the states other than theclose-up mode is schematically illustrated therein. On the contrary,FIG. 8 schematically illustrates the state in which the close-up mode isselectively set. In this mode, upon rotation of the switching lever 1 inthe counterclockwise direction, a pin 47g disposed on an arm member 47ffixedly mounted on the circular frame 47 is pushed by a lens advancinglever 58 which has been rotated in the counterclockwise directionagainst the spring 55 and as a result, the circular frame 47 is heldafter being further rotated in the clockwise direction in addition tothe rotation thereof by the charge member 54. By the construction in theabove described modification, the close-up photography can be alsoexecuted, since the photographing lens is shifted over the ordinaryautomatic focusing adjustable range.

In FIGS. 9a through 9d, a variety of displaying states of the LCD 7 fordisplaying purpose are illustrated. In FIG. 9a, the switching lever 1 isselectively set to "CLOSE-UP" for enabling the close-up photography tobe executed in the close-up mode. In FIG. 9b, the telephoto mode, i.e.,the long focal length photographing mode is selected by adjusting theswitching lever 1 to "TELE" and in FIG. 9c, the standard mode, i.e., themean focal length photographing mode is selected by adjusting theswitching lever 1 to "STANDARD". In these three modes as describedabove, the photographing is executed by setting the pseudo focal lengthphotographing mode and the pseudo focal length photographing signal isprinted on the film. On the contrary, in FIG. 9d, the switching lever 1is set to "WIDE" for the purpose of selecting the wide-angle mode, i.e.,the short focal length photographing mode, and the pseudo focal lengthphotographing mode signal is not designated only in the case where thismode is selected.

FIG. 10 graphically shows various combinations between variations of thefocal length of the photographing lens and the fact whether or not thepseudo focal length photographing mode is designated. A line (A) shows acase where an objective lens having a short focal length of 28 mm and along focal length of 56 mm in the real focal length photographing modeis used as the photographing lens. Here, if the pseudo focal lengthphotographing mode is selected in the short focal length condition, aprint can be obtained equivalent to that photographed by an objectivelens having a focal length of 56 mm. Therefore, the objective lens isused as the photographing lens having an equivalent focal length of 56mm in the short and pseudo focal length photographing mode. Furthermore,if the pseudo focal length photographing mode is selected in the longfocal length condition, a print can be obtained equivalent to thatphotographed by an objective lens having a focal length of 110 mm. Theobjective lens, therefore, is used as the photographing lens having anequivalent focal length of 110 mm in the long and pseudo focal lengthphotographing mode. As a result, the photographing lens is therebyreadily designed and manufactured due to the fact that the photographinglens is required, at the long focal length side, to be secured in imageforming performance only within the range to be printed through trimmingprocess. In the close-up photography, a magnification of the image iscaused to become large through a close photography by shifting thephotographing lens, in the long and pseudo focal length photographingmode, more than the shiftable amount within the ordinary automaticfocusing adjustable range. Hereupon, in this example, although theequivalent focal length in the close-up mode is the same as that in thelong and pseudo focal length photographing mode, since the largemagnification of the image can be obtained in the print through theclose-up photography, this case is shown by a dotted line in FIG. 10 ina manner that the equivalent focal length is extended towards the longerside. In the close-up mode, even when the photographing lens is setwithin the ordinary automatic focusing adjustable range, there is also amethod for enabling the focusing to an object located at the distancenearer than the distance within the ordinary automatic focusingadjustable range by emitting the flash light with an aperture of adiaphragm being forcibly caused to be small. It is also available tocombine this method and the method for increasing the shifting amount ofthe photographing lens. The combination of (A) in FIG. 10 is employed inthe aforegoing embodiment.

In a combination as shown by a line of (B), an objective lens having ashort focal length of 28 mm is used as the photographing lens having theequivalent focal length of 40 mm in the short and pseudo focal lengthphotographing mode. When the photographing lens is changed over to thelonger side in focal length, the photographing lens is caused to havethe focal length of 56 mm and this photographing lens is used as thelens having the equivalent focal length of 80 mm in the long and pseudofocal length photographing mode. In this case, although thephotographing lens becomes to be designed and manufactured withdifficulty, the magnification through trimming process is caused to besmaller than that of the aforementioned case (A), and accordingly, suchan advantage can be obtained that particles of the film hardly becomesconspicuous.

Moreover, various combinations other than the above described ones aregraphically shown by lines of (C), (D), (E) and (F) in FIG. 10.

It is to be noted that if the photographing lens is caused not to havethe short focal length of 28 mm but to have the short focal lengthlonger than this length, it is possible to obtain the photographing lenshaving the long focal length or equivalent focal length longer than thatof the above described embodiment.

In the combination as shown by the line of (F), the focal length in theshort and pseudo focal length photographing mode is caused to coincidewith the equivalent focal length in the long and real focal lengthphotographing mode. This is because when the short and pseudo focallength photographing mode is selected, the photographing with a highshutter speed becomes available due to the fact that an F-number becomessmall, thus resulting in that the photographing can be advantageouslyexecuted in a dark location or by using a flash device having a smalllight emitting amount. Furthermore, when the long and real focal lengthphotographing mode is selected, a print having fine particles thereincan be obtained and this is especially advantageous in the case where anextremely enlarged photograph is required.

With respect to the image in the finder, it may be so constructed that aknown variable magnification finder of a real image type or virtualimage type is employed so that the image of the object to bephotographed is caused to be changeable in magnification in response tothe change-over of the focal length and either of two kinds of large andsmall frames is selectively displayed in accordance with the factwhether or not the pseudo focal length photographing mode is designated.

By the above described construction, when the small frame is displayed,it is readily appreciated that the pseudo focal length photographingmode is selected in either case where the photographing lens is set tothe long focal length side or to the short focal length side. Thechange-over of the frames can be executed through the change-over on theliquid crystal display unit or that of a mechanical frame mask.

There are shown in FIGS. 11a through 11d, various locations on the filmon each of which the pseudo focal length photographing signal isrecorded, while the photographic camera is viewed from the rear sidethereof with a back cover thereof being opened. In the above describedembodiment, although it is so constructed that the image plane to bephotographed is shielded from the light at its upper right corner whenthe photographic camera is viewed from the rear side thereof, as shownin FIG. 3, the present invention is not limited thereby, and it may beso modified that the printing portion of the pseudo focal lengthphotographing signal is provided for the purpose of recording the pseudofocal length photographing signal at the central portion of either ofthe upper, lower, right and left sides of the image plane to baphotographed as shown in FIGS. 11a through 11d, under a limitationwithin the range not to be printed in the case where the pseudo focallength photographing mode is designated.

FIG. 12 is a front view of a light receiving portion of an automaticdistance detecting unit according to this embodiment. The automaticfocal length detecting unit in this embodiment has such a constructionthat a pair of first light receiving elements 62a and 62b are adjacentlydisposed in a direction of a base length so as to receive the imageformed by a reflected light of an infrared light which has been emittedfrom the camera towards the object to be photographed and the distanceup to the object is detected from an output ratio of these two of thefirst light receiving elements 62a and 62b. The aforementioned firstlight receiving elements 62a and 62b shown in FIG. 12 are those forautomatically detecting the distance up to the object in the ordinaryphotographing modes. Furthermore, in this embodiment, another pair cfsecond light receiving elements 64a and 64b are also disposed on oneside of the first light receiving elements 62a and 62b for use in theordinary photographing modes in order to ascertain whether or not thedistance up to the object is suitable for the close-up photography, whenthe close-up mode is selected.

More specifically, there are formed on a base plate 60, two pairs of thefirst and second light receiving elements 62a, 62b and 64a, 64b, asshown in FIG. 12. The first light receiving elements 62a and 62b arethose of the active type distance detecting unit of a known outputcomparison type of two elements. On the other hand, in case of theclose-up mode, the image of the reflected light is formed within therange of the second light receiving elements 64a and 64b and is out ofthe range of the first light receiving elements 62a and 62b. When theoutputs from the second light receiving elements 64a and 64b are equalto each other, it is confirmed that the object measured at this momentis located at the position suitable for the close up photography.

With reference to FIG. 13, an electric circuit in this embodiment willbe explained hereinafter.

There is provided a microcomputer MC to which a power battery BA isconnected through a transistor BT and a resistor. More specifically, thepower battery BA is connected at its positive electrode to an emitter ofthe transistor BT so as to supply an electric power thereto, and thetransistor BT is also connected at its base to an output terminal PWC ofthe microcomputer MC through a resistor. When the output terminal PWC ofthe microcomputer MC is rendered to be "L", the transistor BT becomesconductive and thereafter, the electric power is supplied, through aline (+V) connected to a collector of the transistor BT, to a filmsensitivity reading circuit ISD, a D-A converter DA (digital-to-analogueconverter), a release circuit RLC, an exposure control circuit AE, anautomatic focusing unit AF, an automatically control flash timer FMT, arelease lock warning element RLW, a charge completion display elementCHC and a close-up distance display element DW for close-up photography.Although the power battery BA is grounded at its negative electrode andis further connected at its positive electrode directly to a releasemagnet RM, a shutter control magnet AEM and a lens stop magnet AFM todirectly supply the electric power thereto. The aforementionedmicrocomputer MC, plural kinds of circuits, elements and magnets and soforth will be described in detail hereinafter.

A plurality of code plates CO, ST, CL and TE and a slide brush BL areprovided in this electric circuit so as to change over a photographingmode to another. Although the first code plate CO is grounded to theearth, the second code plate ST is connected to the microcomputer MCdirectly and to an interruption terminal INT0 thereof through a firstpulse generator PG0 and an AND circuit AN0. Furthermore, the third codeplate CL is connected to the microcomputer MC directly and to theinterruption terminal INT0 thereof through a second pulse generator PG1and the AND circuit AN0, and through a third pulse generator PG2 and theAND circuit AN0. Likewise, the fourth code plate TE is also connected tothe microcomputer MC directly and to the interruption terminal INT0thereof through the first pulse generator PG0 and the AND circuit AN0,and through the second pulse generator PG1 and the AND circuit AN0.

The slide brush BL operatively associated with the switching lever 1slides along the plurality of the code plates CO, ST, CL and TE, andwhen the slide brush BL is moved in turn from the upper side towards thelower side in FIG. 13, a waveform as shown in FIG. 14 is sequentiallyoutputted. Firstly, at the time when the slide brush BL is held incontact only with the first code plate CO before it comes into contactwith the second code plate ST, the switching lever 1 is set to "WIDE",that is, the wide-angle photographing mode is selected. In this state,since each of the code plates ST, TE and CL outputs "H" and each outputfrom the pulse generators PG0, PG1 and PG2 is "L", an output from theAND circuit AN0 is kept to be "L", thus resulting in that none of theinterruption signals is applied to the interruption terminal INT0 of themicrocomputer MC.

Thereafter, when the slide brush BL comes into contact with the secondcode plate ST, the output from the second code plate ST is rendered tobe "L" and a pulse of "H" is produced from the first pulse generatorPG0. Consequently, the interruption signal of "L" from the AND circuitAN0 is inputted into the interruption terminal INT0 and the change-overfrom the wide-angle photographing mode to the standard photographingmode is transmitted to the microcomputer MC.

When the slide brush BL is further transferred downwards, it comes incontact with the fourth code plate TE, while still kept in contact withthe second code plate ST and thereby the output from the fourth codeplate TE is rendered to be "L" and the pulse of "H" is outputted fromthe second pulse generator PG1. As a result, since the interruptionsignal of "L" is inputted from the AND circuit AN0 into the interruptionterminal INT0 of the microcomputer MC, the fact that the photographingmode has been changed over from the standard mode to the telephoto modeis transmitted.

Moreover, when the slide brush BL is still caused to move downwards, thecontact relationship between the slide brush BL and the second codeplate ST is broken off and the slide brush BL comes in contact with thethird code plate CL, while kept in contact with the fourth code plateTE. At this time, the output from the third code plate CL turns to be"L" and the pulse of "H" is produced from the third pulse generator PG2.Accordingly, since the interruption signal of "L" is inputted from theAND circuit AN0 into the interruption terminal INT0, the change-overfrom the telephoto mode to the close-up mode is transmitted.

As described above, the pulse of "L" from the AND circuit AN0 isinputted as the interruption signal into the interruption terminal INT0of the microcomputer MC and the operation for switching thephotographing mode is executed by the microcomputer MC in response toeach of the interruption signals. At the time shown by (a) and (b) inFIG. 14, since each of the outputs from the third and fourth code platesCL and TE is "L", none of the pulses is outputted from the first andsecond pulse generators PG0 and PG1.

There is illustrated in FIG. 15, a specific construction of the pulsegenerator PG0, PG1, PG2 or PG3 as shown in FIG. 13. In FIG. 15, acircuit encircled by a double dotted chain line corresponds to the firstor second pulse generator PG0 or PG1 and a circuit encircled by a dottedline corresponds to the third or fourth pulse generator PG2 or PG3. Morespecifically, each of the first and second pulse generators PG0 and PG1is composed of a delay circuit DL0, an exclusive OR circuit EO0 and anAND circuit AN1, while the delay circuit DL0 is applied with the outputfrom the second or third code plate ST or CL and the exclusive ORcircuit EO0 is applied with the output from the second or third codeplate ST or CL at its one input terminal and with the output from thedelay circuit DL0 at its other input terminal, and the AND circuit AN1is applied with the output from the exclusive OR circuit EO0 at its oneinput terminal and with the output from the fourth code plate TE at itsother input terminal.

Each of the third and fourth pulse generator PG2 and PG3 is composed ofthe delay circuit DL0 and the exclusive OR circuit EO0, while theexclusive OR circuit is applied with an input signal directly at itsinput terminal and with the same input signal at its other terminalthrough the exclusive OR circuit EO0. Accordingly, in either ofinversions of the input signals from "H" to "L" and from "L" to "H", thepulse of "H" is outputted from each of the pulse generators PG0, PG1,PG2 and PG3.

Referring back to FIG. 13, a back cover switch BCS is grounded at itsmovable contact and is connected at its stationary contact to themicrocomputer MC directly and to an interruption terminal INT1 thereofthrough the fourth pulse generator PG3 and a diode. A light measuringswitch S1, a release switch S2, a preparatory winding switch PWS, a oneframe switch 1FS, an overload detecting switch OLS, a film detectingswitch FIS, a lens position switch LPS and a set of finder positionswitches FPS1 and FPS2 are collectively grounded at their movablecontacts and are directly coupled to the microcomputer MC at theirstationary contacts.

When the back cover is opened, the back cover switch BCS is turned onand on the contrary, when the back cover is closed, the back coverswitch BCS is turned off. The light measuring switch S1 and the releaseswitch S2 are turned on respectively at the first and second steps cfthe depression of the shutter release button 9.

The preparatory winding switch PWS operatively associated with a framecounter (not shown), which mechanically counts the number of the framesphotographed, is kept on during the period from the time when the backcover has been closed, i.e., when the counter has been rendered to be"S" till the time immediately before the film has been wound up by threeframes so that the counter has been rendered to be "1", and during thisperiod in which the preparatory winding switch PWS is kept on, thepreparatory winding of the film is executed so that the film ispreparatorily wound up by three frames to the frame capable of beingphotographed, when the film has been loaded into the camera.

The one frame switch 1FS is turned on in the case where the film hasbeen completely wound up by one frame and is turned off during thewinding of the film. The overload detecting switch OLS is turned on whenthe winding system has been overloaded, i.e., ordinarily when the filmhas been tensioned in case of winding of the last frame thereof and thisswitch is turned off when an operation for rewinding the film isinitiated.

The film detecting switch FIS is kept off when the film is loaded in thecamera and is kept on when the film is not loaded therein. It is soconstructed that the rewinding of the film is interrupted when thisswitch FIS is turned on during the rewinding operation. The count switchCS is turned on at the time when the shutter begins to open. When thisswitch CS is turned on, not only a count operation for controlling theexposure time is caused to start in the exposure control circuit AEexplained in detail hereinafter, but also another count operation of thetimer for controlling a timing for flash emission is caused to start ina timer circuit of the automatically control flash timer FMT.

The lens position switch LPS is the switch for indicating the positionof the lens in the axial direction of the optical axis of thephotographing lens. The lens position switch LPS is kept on, when themovable lens barrel 2 as shown in FIG. 1 is protruding from the camerabody in either of the telephoto mode and the close-up mode and on thecontrary, this switch LPS is kept off, when the movable lens barrel 2 isnot protruding from the camera body in either of the wide angle mode andthe standard mode. The first and second finder position switches FPS1and FPS2 correspond to the code plate 17 and the code reading brush 18shown in FIG. 2, respectively. Table 1 shows relationships among the onoff state of the switches LPS, FPS1 and FPS2, each photographing modeand the fact whether or not the pseudo focal length photographing modeis designated. It can be readily appreciated through recognition of theon off state of each of the switches LPS, FPS1 and FPS2 that either oneof the wide angle mode (WP), standard mode (STP), telephoto mode (TEP)and close-up mode (CLP) has been selected.

                  (TABLE 1)                                                       ______________________________________                                        Photographing Mode                                                                         LPS     FPS1    FPS2   Pseudo mode                               ______________________________________                                        Wide Angle (WP)                                                                            OFF     OFF     OFF    NO                                        Standard (STP)                                                                             OFF     OFF     ON     YES                                       Telephoto (TEP)                                                                            ON      ON      ON     YES                                       Close-Up (CLP)                                                                             ON      ON      OFF    YES                                       ______________________________________                                    

The liquid crystal display unit DSP connected to the microcomputer MCdisplays data therefrom and corresponds to the liquid crystal displayunit 7 shown in FIG. 1. The release lock warning element RLW. chargecompletion display element CHC and close-up distance display element DWare connected to respective output terminals of the microcomputer MC soas to display in the finder. More specifically, the release lock warningelement RLW is provided for warning a state in which the shutter releasebutton is locked and the charge completion display element CHC isprovided for displaying a state in which a main capacitor of a flashcircuit FL has been completely charged and furthermore, the close-updistance display element DW is provided for indicating whether or notthe distance up to the object to be photographed is suitable for theclose-up photography in the case where the close-up mode is selected.

A film winding motor FWM is coupled to a first motor control circuit MD0coupled to output terminals WSTA and RWSTA of the microcomputer MC.Likewise, a lens driving motor LDM is coupled to a second motor controlcircuit MD1 coupled to output terminals FSTA1 and BSTA1 of themicrocomputer MC, and a finder driving motor FDM is coupled to a thirdmotor control circuit MD2 coupled to the microcomputer MC through outputterminals FSTA2 and BSTA2 thereof. The film winding motor FWM iscontrolled by the first motor control circuit MD0 so as to wind up orrewind the film. When the output terminal WSTA of the microcomputer MCis "L", the first motor control circuit MD0 controls the film windingmotor FWM so as to wind up the film and on the contrary, when the outputterminal RWSTA of the microcomputer MC is "L", the first motor controlcircuit MD0 controls the film winding motor FWM so as to rewind thefilm.

The lens driving motor LDM is operated to change the real focal lengthof the photographing lens. More specifically, the lens driving motor LDMhas a function for driving the photographing lens towards the highmagnification side (the long focal length side) in the case where theoutput terminal FSTA1 of the microcomputer MC is "L" and towards the lowmagnification side (the short focal length side) in the case where theoutput terminal BSTA1 thereof is "L". The finder driving motor FDM isoperated to change the magnification of the finder in compliance withthe change of the real focal length of the photographing lens, that is,the finder driving motor FDM is operated so as to change themagnification of the finder towards the high magnification side in thecase where the output terminal FSTA2 of the microcomputer MC is "L" andtowards the low magnification side in the case where the output terminalBSTA2 thereof is "L".

The flash circuit FL for controlling the electronic flash 6 shown inFIG. 1 is connected to the microcomputer MC through output terminalsFLSTA and DSTA thereof and an output terminal CHS of the flash circuitFL. The flash circuit FL is further connected to an output terminal TRGof the automatically control flash timer FMT in order to cause theelectronic flash 6 to emit the flash light by receiving a signaltherefrom. In this circuit, a voltage boosting is commenced to chargethe main capacitor for flash emission, when the output terminal FLSTA cfthe microcomputer MC is rendered to be "L", and the charged state of themain capacitor is detected when the output terminal DSTA cf themicrocomputer MC is rendered to be "L". The signal of "H" or "L" isoutputted from the output terminal CHS of the flash circuit FL into themicrocomputer MC, respectively when the main capacitor has beencompletely charged or when it is not still fully charged.

There is also provided a printing circuit TRIP of the pseudo focallength photographing mark, a one-shot circuit OS and a data printingunit DAIP. The printing circuit TRIP is connected to an output terminalTRM of the microcomputer MC, to an output terminal IPS thereof throughthe one-shot circuit OS and to the film sensitivity reading circuit ISDthrough the D-A converter DA. The film sensitivity reading circuit ISDis further connected to the microcomputer MC and to the automaticallycontrol flash timer FMT. The data printing unit DAIP is connected to theoutput terminal IPS of the microcomputer MC through a connector CON.

When the photographing node is set in the pseudo focal lengthphotographing mode in case of the selection of either of the standardmode, telephoto mode and close-up mode, the printing circuit TRIP forthe pseudo focal length photographing mark comes into an operable statedue to the fact that the output terminal TRM of the microcomputer MC isrendered to be "L". In this state, in response to a negative edge of thedata printing signal outputted from the output terminal IPS of themicrocomputer MC, a pulse is outputted from the one-shot circuit OS asspecifically shown in FIG. 16 and this results in that the printingcircuit TRIP starts the printing operation. The one shot circuit OS iscomposed, as shown in FIG. 16, of a delay circuit DL1 and an AND circuitAN2 which is applied with an input signal at its one input terminal andthe same signal at its other input terminal through the delay circuitDL1. The printing circuit TRIP is applied with an input signal convertedthrough the D-A converter DA into an analogue value from a datacorresponding to the film sensitivity, which data is sent from the filmsensitivity reading circuit ISD, and the printing operation is executedduring a period corresponding to the film sensitivity which has beenread.

The data of the film sensitivity sent from the film sensitivity readingcircuit ISD is also inputted as the signal in the digital form into themicrocomputer MC and the automatically control flash timer FMT withoutany conversion thereof.

The data printing unit DAIP provided on the back cover of the camera isso constructed as to print a predetermined data from the real surface ofthe film and is applied with a printing signal outputted from the outputterminal IPS of the microcomputer MC through the connector CON. Thisprinting signal is rendered to be "L" with the commencement of theexposure control operation and is turned to be "H" after a lapse of timecorresponding to the film sensitivity sent from the film sensitivityreading circuit ISD, and the data printing unit DAIP executes theprinting operation only during the period in which this printing signalis kept to be "L". This data printing unit DAIP includes a clock circuitto be used for a calendar function, a liquid crystal display portion forprinting and monitoring the data to be printed, a light source forprinting, a source battery therefor and the like.

Referring further to FIG. 13, an output terminal EXSTA of themicrocomputer MC is connected to the release circuit RLC coupled to therelease magnet RM, to the exposure control circuit AE coupled to theshutter control magnet AEM and to the automatic focusing unit AF coupledto the lens stop magnet AFM. The exposure control circuit AE isconnected to the microcomputer MC through output terminals AEL and TEMand an input terminal LTS thereof, and to the film sensitivity readingcircuit ISD through the D-A convertor DA. The exposure control circuitAE is further directly connected, through an output terminal AECthereof, to the microcomputer MC and the automatically control flashtimer FMT and is also connected to a count switch CS at its movablecontact and the automatically control flash timer FMT through the outputterminal TRG thereof, with the count switch CS being grounded at itsstationary contact. An output terminal CLM of the microcomputer MC isconnected to the exposure control circuit AE, the automatic focusingunit AF and the automatically control flash timer FMT. Moreover, theautomatic focusing unit AF is coupled to an input terminal DCH of themicrocomputer MC and the automatically control flash timer FMT through adata line DISD. In addition, the automatically control flash timer FMTis further coupled to the count switch CS at its movable contact and tothe microcomputer MC through the output terminal TEM and an outputterminal FLEN thereof.

The release circuit RLC initiates the shifting of the photographing lensthrough releasement from the engaged state thereof by energizing theshutter release magnet RM corresponding to the release magnet 43 shownin FIG. 5, when the output terminal EXSTA of the microcomputer MC isrendered to be "L".

At the same time, a closing operation of the shutter is interrupted bythe shutter control magnet AEM energized by the exposure control circuitAE. Hereupon, in this embodiment, the release magnet RM is operated sothat the shifting of the photographing lens is initiated andsimultaneously, an advanced traveling plate (not shown) starts to move.Although the shifting of the lens is interrupted at the positioncorresponding to a result of the measured distance, the advancedtraveling plate continues to travel until it releases the engagement ofthe shutter releasing member at its end position. Thereafter, uponcommencement of the shutter opening operation, the count switch CS isturned on.

When the aforementioned transistor BT becomes conductive, it iscommenced to supply the electric power to the exposure control circuitAE through the line (+V) and this results in that the light measuringoperation is initiated. The exposure value Ev is outputted with additionof both of the brightness value Bv of the measured light and the valueSv of the film sensitivity from the D-A converter DA. Upon lapse of aperiod to be required from the time when it is commenced to supply theelectric power from the line (+V) till the time when the light measuringunit provided in the exposure control circuit AE is stabilized, when theoutput terminal AEL of the microcomputer MC is rendered to be "L", theexposure value Ev at this time is latched in the exposure controlcircuit AE through A-D conversion thereof (This is called "AE-lock".).

On the other hand, the exposure control circuit AE contains an encoderfor outputting pulses which is operatively associated with the movementof the shutter and these pulses are counted by a counter (not shown)which is brought into an active state by the closure of the count switchCS, thus resulting in that the exposure value Ev determined by theaperture of the diaphragm at that time is outputted. When the exposurevalue subjected to the AE-lock and the counted value become to becoincident with each other, the shutter is closed through de-energizingof the shutter control magnet AEM. In this embodiment, when the focallength of the photographing lens is doubled, the aperture valuedecreases by two steps even in case of the same aperture of thediaphragm. Furthermore, the shutter speed is limited from its lowestvalue of 1/30 to prevent a camera blur, to its highest value of 1/500which is restricted by the construction of the shutter. Accordingly, asshown in a program diagram of FIG. 17, the exposure value Ev and theshutter speed are different in the operative range associated with eachother, between in case of either of the wide-angle mode and standardmode and in case of the telephoto mode. Therefore, when the exposurevalue Ev subjected to the AE-lock is smaller than "8" in case of eitherof the wide-angle mode and standard mode, i.e., in case of the shortfocal length mode, or when this exposure value Ev is smaller than "10"in case of the telephoto mode, i.e., in case of the long focal lengthmode, the output terminal LTS of the exposure control circuit AE isrendered to be "L" in order to indicate the lowest limit of the shutterspeed. More specifically, when the output terminal TEM of themicrocomputer MC is "H" in either of the wide-angle mode, standard modeand close-up mode, a comparison is made between the exposure value Evsubjected to the AE-lock and a data corresponding to the exposure valueof "Ev= 8" and on the other hand, when the output terminal TEM is "L" inthe telephoto mode, the comparison is made between the exposure valuesubjected to the AE-lock and a data corresponding to the exposure valueof "Ev=10". Consequently, when the exposure value Ev subjected to theAE-lock is smaller than the predetermined value of "Ev=8" or "Ev=10"with which the exposure value of the former is compared, the outputterminal LTS of the exposure control circuit AE is rendered to be "L".At this stage, when the input terminal LTS of the microcomputer MC isrendered to be "L", the natural light photographing mode is switched tothe flash light photographing mode. This signal from the input terminalLTS is of no use in the close-up mode.

Subsequently, the shutter control operation will be explainedhereinafter. The shutter is opened or closed in accordance with awaveform as shown in FIG. 18. When the output terminal TEM of themicrocomputer MC is "H", a data corresponding to "Ev=16" ispreliminarily set in the counter before the opening of the shutter andon the contrary, when the output terminal TEM is "L", another datacorresponding to "Ev=18" is preliminarily set in the counter.Thereafter, when the count switch CS is turned on upon commencement ofthe opening of the shutter, not only the counting by the counter iscaused to be operable, but also the driving circuit for de-energizingthe shutter control magnet AEM is caused to be operable. When it hasbeen judged that the data in the counter is equal to or smaller than theexposure value Ev subjected to the AE-lock through a comparison betweenthe latter and the data of the former which has been counted down byturns from the value set preliminarily in accordance with the pulseoutputted from the encoder operatively associated with the shutter, theclosing of the shutter is initiated by the shutter control magnet AEMwhich has been de-energized.

When the exposure value Ev subjected to the AE-lock is smaller than "8"or "10", the data subjected to the AE-lock is set anew to "Ev=8" or"Ev=10". Thereby, the flash photography is executed by restricting theaperture value and the shutter speed to F2.8 and 1/30 respectively, orF5.6 and 1/30 respectively, as shown in the program diagrams of FIGS. 17and 18.

Furthermore, in the case where the exposure value Ev subjected to theAE-lock is greater than "16" or "18", when the count switch CS has beenturned on after the commencement of the opening of the shutter, theshutter control magnet AEM is immediately de-energized and thereafter,the operation for closing the shutter is initiated. The shutter is,however, opened and closed in accordance with the waveform as shown bythe aperture value of F11 and the shutter speed of 1/500 or the aperturevalue of F22 and the shutter speed of 1/500 in FIG. 18, due to aresponse delay of the shutter control magnet AEM, a delay of mechanicalportions or the like. Accordingly, in the case where the exposure valueEv subjected to the AE-lock is greater than "16" or "18", the shutterspeed is limited up to 1/500 at the high speed side. Furthermore, whenthe shutter control magnet AEM has been de-energized, the "L" pulsehaving a predetermined width of time is outputted from the outputterminal AEC of the exposure control circuit AE and is sent to themicrocomputer MC and the automatically control flash timer FMT.

When the transistor BT becomes conductive to initiate the electricsupply to the automatic focusing unit AF from the line (+V), the pulselight is emitted from the infrared light emitting diode towards theobject to be photographed and the pulse light reflected by the object isreceived somewhere between the pair of the light receiving elements 62aand 62b shown in FIG. 12. In the outputs from the pair of the lightreceiving elements 62a and 62b, the signal corresponding to a ratio oflight amounts of the pulse lights received thereby, which signalindicates the distance up to the object to be photographed, is sampledand held in compliance with the timing of emission of the pulse light.The signal which has been sampled and held is latched through A-Dconversion thereof (This is called AF-lock.). The data corresponding tothe distance up to the object which has been subjected to the AF-lock issent to the automatically control flash timer FMT through the data lineDISD.

In case of the close-up mode, the output terminal CLM of themicrocomputer MC is rendered to be "L" and it is judged whether or notthe pulse light has been received between the pair of the lightreceiving elements 64a and 64b shown in FIG. 12. More specifically, itis judged whether or not, in the outputs from the light receivingelements 64a and 64b at the time of emission of the pulse light, a ratioof components of the pulse lights is within a predetermined range, i.e.,within a permissible range of the distance designed for thephotographing lens in the close-up mode. When this ratio is out of thepredetermined range, the output terminal DCH is rendered to be "L". Whenthe input terminal DCH of the microcomputer MC is "H", the close-updistance display element DW for the close-up photography displays thatthe distance up to the object is suitable for the close-up photographyand on the contrary, when the input terminal DCH is "L", the close-updistance display element DW never display that the distance is suitablefor the close-up photography but inform this result to the user.

When the output terminal EXSTA of the microcomputer MC is rendered to be"L", upon commencement of the shifting of the photographing lens byenergizing the release magnet RM corresponding to the magnet 43 shown inFIG. 5 in the release circuit RLC, pulses are outputted from an encoder(not shown) with the shifting of the lens. At the same time, however,since the output terminal EXSTA of the microcomputer MC is rendered tobe "L", the lens stop magnet AFM corresponding to the magnet 48 shown inFIG. 5 is also energized. When the data subjected to the AF-lock hascoincided with the count data of the pulses from the encoder, theautomatic focusing unit AF de-energizes the lens stop magnet AFM to stopthe shifting of the lens. Hereupon, in case of the close-up mode, i.e.,when the output terminal CLM of the microcomputer MC is "L", the lensstop magnet AFM is kept in the de-energized state even if the outputterminal EXSTA of the microcomputer MC is rendered to be "L".

The automatically control flash timer FMT outputs into the flash circuitFL by decoding the data of time corresponding to the emission amount ofthe flash light in accordance with the data of the film sensitivity fromthe film sensitivity reading circuit ISD and the data of the distance upto the object from the automatic focusing unit AF and thereafter, whenthe count switch CS is turned on, the counting of the time which hasbeen decoded is initiated in the automatically control flash timer FMT.Furthermore, when it has been counted to the counting amountcorresponding to the time decoded, the automatically control flash timerFMT outputs the "L" pulse from the output terminal TRG thereof and sendsthe signal for the flash light emission to the flash circuit FL to emitthe electronic flash 6. As a result, the electronic flash 6 is caused toemit the flash light at the time when the aperture of the diaphragm hasbeen brought to the aperture value required for the proper exposuredetermined by the film sensitivity, distance up to the object andemission amount of the flash light. The automatically control flashtimer FMT is, however, controlled by the signal sent from the outputterminal FLEN of the microcomputer MC and is operated in the case wherethe output terminal FLEN is rendered to be "L".

The aperture value in case of the telephoto mode is different by twosteps from that in case of the wide-angle mode or standard mode, asshown in FIG. 17, even if the same aperture of the diaphragm or the sameshutter speed is set in these two modes. Accordingly, the automaticallycontrol flash timer FMT decodes so that the signal for emitting theflash light is outputted, in the telephoto mode in which the outputterminal TEM of the microcomputer MC is "L", at the time delayed by twosteps, i.e., at the time the aperture of the diaphragm has been furtheropened by two steps, as compared wit the time in the wide-angle mode orstandard mode in which the output terminal TEM is "H", even in the casewhere the film sensitivity and distance up to the object are same inthese modes. For this end, the output terminal TEM of the microcomputerMC is also connected to the automatically control flash timer FMT andthe fact whether or not the telephoto mode is set is transmitted to theautomatically control flash timer FMT.

Moreover, as the shutter speed is limited to 1/30 in the case where theproper aperture value is smaller than F2.8 or F5.6, for example, theobject is located at the long distance, the shutter control magnet AEMis de-energized immediately before completion of the counting of thedata decoded by the automatically control flash timer FMT, thusresulting in that the pulse of "L" is outputted from the output terminalAEC of the exposure control circuit AE. In the above described manner,when the pulse of "L" has been inputted into the automatically controlflash timer FMT from the output terminal AEC of the exposure controlcircuit AE before completion of the counting of the timer, theautomatically control flash timer FMT outputs this pulse from the outputterminal TRG thereof to enable the flash light to be emitted.

In addition, when the output terminal CLM of the microcomputer MC is "L"in the close-up mode, the automatically control flash timer FMT decodesthe data predetermined so as to obtain a proper exposure amount inaccordance with the light emission amount, distance designed for thephotographing lens, and the film sensitivity. Upon completion of thecounting by the timer, the pulse is outputted into the output terminalTRG of the automatically control flash timer FMT to enable the flashlight to be emitted. In the close-up mode, the operation for controllingthe shutter is not executed in the exposure control circuit AE and theshutter control magnet AEM is kept in the energized condition. When thepulse of "L" is applied to the exposure control circuit AE from theoutput terminal TRG of the automatically control flash timer FMT, theexposure control circuit AE de-energizes the shutter control magnet AEMto close the shutter. In other words, in the close-up mode, the exposureis only automatically controlled on the basis of the distance forphotography which is fixedly determined in advance through designing ofthe lens and accordingly, the natural light photography is neverexecuted.

Hereinafter, the operation of the embodiment will be described withreference to FIGS. 19a and 19b which are continuous onto each other andillustrate a flow-chart illustrating the switching of the photographingmode by means of the switching lever 1.

The switching of the photographing mode is initiated when aninterruption signal which is an "L" pulse is inputted to theinterruption terminal INT0 of the microcomputer MC. More specifically,when outputs from the code plates ST, TE and CL along which the slidebrush BL operatively associated with the switching lever 1 slides arecaused to change, one of the pulse generators PG0, PG1 and PG2 generatesan "H" pulse causing the AND circuit AN0 to generate the "L" pulse whichis in turn applied as the interruption signal to the interruptionterminal INT0. In response to the application of the interruption signalto the interruption terminal INT0, the program flow shown in FIGS. 19aand 19b starts at step #0. During this step #0, all of the outputterminals FLSTA, DSTA, FSTA1, BSTA1, FSTA2 and BSTA2 of themicrocomputer MC are rendered to be "H" so that, in the event that theinterruption is effected during the operation in which voltage to beused for flashing is boosted, the switching of the photographing lensand the finder switching operation, these operations can be interrupted.

Subsequently, and at step #1, the interruption from the interruptionterminal INT0 is permitted even during the switching of thephotographing mode, thereby proceeding to step #2. At step #2, adecision is made to determine whether or not the output signal from thethird code plate CL indicates that the close-up mode have been selected.In case of the close-up mode, the output signal from the third codeplate CL is "L" and, therefore, the program flow proceeds to step #10 atwhich the output terminal FSTA2 of the microcomputer MC is rendered tobe "L" while the finder is switched to a high magnification stateappropriate to the close-up mode. Then, a wait condition takes place atstep #11 to enable the close-up state CLP shown in Table 1 to beestablished, followed by step #12 at which the output terminal FSTA2 ofthe microcomputer MC is rendered to be "H" to enable the switching ofthe finder to be released. Thereafter, and at step #13, the outputterminal CLM of the microcomputer MC is rendered to be "L" indicating tothe automatic focusing unit AF that the photographing mode is selectedto be the close-up mode, followed by step #14 at which the outputterminal TEM is rendered to be "H" to release an signal representativeof the telephoto mode and, at step #15, the liquid crystal display unitDSP provides a display descriptive of the close-up mode. At subsequentstep #16, a flash flag FLF is set to "1" in readiness for the actualphotographing under a flash lighting condition, and the program flowproceeds to step #66. If the photographing mode is at this time switchedonto the close-up mode, no switching of the photographing lens isrequired because the switching takes place from the telephoto modewherein the photographing lens is always in a high magnification state.

Unless the result of decision at step #2 indicates that the outputsignal from the third code plate CL is "L", a decision at step #3 takesplace to determine if the output signal from the fourth code plate TE is"L", that is, if the photographing mode is the telephoto mode. In thecase where the telephoto mode is selected, the output signal from thefourth code plate TE is "L" and, in such case, the program flow proceedsto step #20 at which a decision is made to determine if it is theclose-up state CLP. If the result of the decision at step #20 indicates"yes", this means that the photographing mode is switched from theclose-up mode onto the telephoto mode and, therefore, the outputterminal BSTA2 is rendered to be "L" at subsequent step #21 so that thefinder is switched to the low magnification state appropriate to thetelephoto mode, followed by a wait condition at step #22 which continuesuntil the telephoto state TEP can be established. Subsequent to theestablishment of the telephoto state TEP, the program flow proceeds tostep #23 at which the output terminal BSTA2 is rendered to be "H" s thatthe finder switching operation can be released, followed by step #24 atwhich the output terminal CLM indicative of the close-up mode isrendered to be "H" so that the close-up mode can be released. At step#31, the flash flag FLF is reset to "0", and at step #32 the outputterminal TEM indicative of the telephoto mode is rendered to be "L" sothat the telephoto mode can be transmitted. At step #33, the telephotomode is displayed by the liquid crystal display unit DSP, and theprogram flow then proceeds to step #66. In this way, even where theclose-up mode is switched over to the telephoto mode, the photographinglens need not be switched since it has been set in the highmagnification state during the close-up mode.

If the result of decision at step #20 indicates that it is not theclose-up state CLP, this means that the telephoto mode has been switchedover from the standard mode and, therefore, step #25 takes place atwhich the output terminal FSTA2 of the microcomputer MC is rendered tobe "L" so that the finder can be switched over from the lowmagnification state for the standard mode onto the high magnificationstate for the telephoto mode, followed by a wait condition at step #26which continues until the telephoto state TEP is established. Upon theestablishment of the telephoto state TEP, step #27 takes place at whichthe output terminal FSTA2 is rendered to be "H" so that the finderswitching operation can be released. At subsequent step #28, the outputterminal FSTA1 is rendered to be "L" so that the photographing lens canbe switched over from the low magnification state appropriate to thestandard mode onto the high magnification state appropriate to thetelephoto mode, followed by step #29 at which a wait condition takesplace until the lens position switch LPS is closed. Subsequent to theclosure of the lens position switch LPS, the output terminal FSTA1 isrendered to be "H" so that the lens switching operation can be released,followed by step #32.

If the result of decision at step #3 indicates that the output signalfrom the fourth code plate TE is not "L" signifying that thephotographing mode is not the telephoto mode, step #4 takes place todetermine if the output signal from the second code plate ST isrepresentative of the standard mode. When the output signal from thesecond code plate ST is "L", this means that the standard mode isselected and, therefore, the program flow proceeds to step #40 at whicha decision is made to determine if it is the telephoto state TEP. If theresult of decision at step #40 is "yes", the output terminal BSTA2 ofthe microcomputer MC is rendered to be "L" at step #41 so that thefinder can be switched over from the high magnification state for thetelephoto mode onto the low magnification state for the standard mode,followed by step #42 at which a wait condition takes place until thestandard state STP is established. Subsequent to the establishment ofthe standard state STP, the output terminal BSTA2 is rendered to be "H"at step #43 so that the finder switching operation is released, and atstep #44, the output terminal BSTA1 is rendered to be "L" so that thephotographing lens can be switched onto the low magnification state,followed by step #45 at which a wait condition takes place until thelens position switch LPS is opened. When the lens position switch LPS isopened, the output terminal BSTA1 is rendered to be "H" at step #46 sothat the lens switching operation can be released, and at subsequentstep #47, the output terminal TEM is rendered to be "H" so that thetelephoto mode can be released, followed by step #53 at which thestandard mode is indicated by the liquid crystal display unit DSP.Thereafter, the program flow proceeds to step #66.

If the result of decision at step #40 indicates that it is not thetelephoto state, this means that the standard mode has been switchedfrom the wide-angle mode and the program flow proceeds to step #48 atwhich the output terminal FSTA2 is rendered to be "L", so that thefinder can be switched over from the low magnification state for thewide-angle mode onto the high magnification state appropriate to thestandard mode. Then, at step #49, a wait condition takes place until thestandard state STP is established. Subsequent to the establishment ofthe standard state STP, the output terminal FSTA2 is rendered to be "H"at step #50 so that the finder switching operation can be released,followed by step #51 at which the output terminal TRM of themicrocomputer MC is rendered to be "L" so that the pseudo focal lengthphotographing mark can be imprinted. At step #52, the liquid crystaldisplay unit DSP displays that the pseudo focal length photographingmode has been set, and the program flow then proceeds to step #53.

Should the result of decision at step #4 indicate that the output signalfrom the second code plate ST is not "L", this means that the wide-anglemode has been switched from the standard mode, and, therefore, theprogram flow proceeds to step #60 at which the output terminal BSTA2 ofthe microcomputer MC is rendered to be "L" so that the finder can beswitched over from the high magnification state for the standard modeonto the low magnification state for the wide-angle mode, followed by await condition at step #61 which continues until the wide-angle state WPis established. Subsequent to the establishment of the wide-angle stateWP, the output terminal BSTA2 is rendered to be "H" at step #62 torelease the finder switching operation, and at step #63, the outputterminal TRM is rendered to be "H" so that the imprinting of the pseudofocal length photographing mark can be released. Thereafter, the displayof the pseudo focal length photographing mode by the liquid crystaldisplay unit DSP is released at step #64, followed by the display of thewide-angle mode at step #65. The program flow then proceeds to step #66.

At step #66, a decision is made to determine whether or not theinterruption signal is applied to the interruption terminal INT1 towhich the output from the fourth pulse generator PG3 shown in FIG. 13 isapplied through the inverter IN0. That is, this interruption isinitiated in response to both of the opening and closure of the backcover switch BCS adapted to be opened and closed in response to theopening and closure of the back cover of the camera. Specifically, ifthe interruption signal is applied to the interruption terminal INT1 asa result of the manipulation of the back cover during the execution ofthe program flow from step #0 to step #66, a back cover routine shown inFIG. 20 is executed, but if it is not, a STOP routine shown in FIG. 21cis executed.

Referring now to FIG. 20 illustrating the back cover routine, when theinterruption signal is applied to the interruption terminal INT1 of themicrocomputer MC as a result of the manipulation of the back cover, bothof the output terminals PLSTA and DSTA of the microcomputer MC arerendered to be "H" at step #70 so that the voltage boosting operationand the charge completion detecting operation of the flash circuit FLcan be interrupted. At subsequent step #71, a division made to determinewhether or not the back cover switch BCS is closed. If the back coverswitch BCS is opened, this means that the back cover is closed and,therefore, the program flow proceeds to step #72 at which the outputterminal WSTA is rendered to be "L" so that the film winding motor FWMshown in FIG. 13 can be driven in a direction required to wind the film.At subsequent step #73, a wait condition takes place, while the film isbeing wound, until the preparatory winding switch PWS is opened. Uponthe opening of the preparatory winding switch PWS, a wait conditiontakes place at step #74 until the one frame switch 1FS is closed.Subsequent to the closure of the one frame switch 1FS, the microcomputerMC renders the output terminal WSTA to be "H" so that the film windingcan be interrupted. During the execution of the program flow from step#72 to step #75, the preparatory winding of the film over a length offilm corresponding to three frames can be wound up.

Should the result of decision at step #71 indicate that the back coverswitch BCS is closed, this means that the back cover is opened and,therefore, the program flow proceeds to step #80 at which a decision ismade to determine if the one frame switch 1FS is closed. Since the oneframe switch 1PS is closed in the case where the film winding completes,when the result of decision at step #80 indicates that the one frameswitch 1FS is not closed, this means that the film winding has not yetcompleted, that is, the film is not tensioned and therefore, the outputterminal WSTA of the microcomputer MC is rendered to be "L" so that thefilm winding motor FWM can be driven in a direction required to completethe film winding. When the closure of the one frame switch 1FS isdetected at step #82, the output terminal WSTA is rendered to be "H" atstep #83 so that the film winding can be interrupted. Thus, unless thefilm winding is completed by reason of the tensioning of the film, thewinding of the film remaining at the time the back cover is opened iseffected and a mechanism therefor is consequently charged.

The program flow then proceeds from step #75 or step #83 to step #84 atwhich a decision is made to determine if, as a result of themanipulation of the switching lever 1 shown in FIG. 1 during theexecution of the program flow from step #70 to step #84, theinterruption signal is applied to the interruption terminal INT0. Shouldthe result of decision at step #84 indicate that the interruption signalis applied to the interruption terminal INT0, the program flow returnsto the mode changing routine shown in FIGS. 19a and 19b, but if it doesnot, the STOP routine shown in FIG. 21c takes place.

Referring next to FIGS. 21a through 21c, a routine for the exposure,winding and rewinding according to this embodiment will be explainedhereinafter.

This routine is initiated by the interruption signal applied to theinterruption terminal INT2 of the microcomputer MC through the closureof the light measuring switch S1 shown in FIG. 13. The light measuringswitch S1 is closed at the first step of the depression of the shutterrelease button 9 shown in FIG. 1.

Firstly, when the interruption signal is inputted, both of the outputterminals FLSTA and DSTA of the microcomputer MC are rendered to be "H"at step #90, the voltage boosting operation and the charge completiondetecting operation in the flash circuit FL are interrupted.Subsequently, at step #91, the output terminal PWC of the microcomputerMC is rendered to be "L" so that the transistor BT becomes conductiveand it is commenced to supply, through the line (+V), the electric powerto the film sensitivity reading circuit ISD, D-A converter DA, releasecircuit RLC, exposure control circuit AE, automatic focusing unit AF,automatically control flash timer FMT, release lock warning element RLW,charge completion display element CHC and close-up distance displayelement DW, as shown in FIG. 13.

A wait condition takes place at step #92 during a predetermined periodrequired for stabilization of the light measuring circuit contained inthe exposure control circuit AE, and thereafter at step #93, the outputterminal AEL of the microcomputer MC is rendered to be "L" so that themeasured light value is subjected at this moment to the AE-lock. It isjudged at step #94 whether or not the close-up mode is set. In case ofthe close-up mode, the program flow proceeds to step #95 at which it isjudged whether or not the object to be photographed is located at theposition suitable for the close-up photography by judging the signal ofthe input terminal DCH of the microcomputer MC inputted from theautomatic focusing unit AF. In the case where the object is located atthe distance suitable for the close-up photography, since the inputterminal DCH is not "L", the program flow proceeds to step #96 toexecute the display of the close-up distance display element DW. If theinput terminal DCH of the microcomputer MC is "L" at step #95, none ofthe display is executed by the close-up distance display element DW dueto the fact that the object is located at a distance unsuitable for theclose-up photography.

In the case where the close-up mode is not set at step #94, the programflow proceeds to step #97 at which it is judged whether or not theshutter speed is restricted by its lowest value through the judgment bythe microcomputer MC whether or not the signal of the input terminal LTSinputted from the exposure control circuit AE is "L". Unless the shutterspeed is restricted by its lowest value, the program flow proceeds tostep #98 at which "0" is reset into the flash flag FLF which is set to"1" in the flash photography and in the case where the shutter speed isrestricted by its lowest value, since the input terminal LTS is "L", theprogram flow proceeds to step #100 to execute the flash photography.

More specifically, in the close-up mode or in the case where the shutterspeed is restricted by its lowest value in either of the modes otherthan the close-up mode, the flash photography is executed. At step #100,the flash flag FLF is set "1" for the flash photography and at step#101, the output terminal DSTA of the microcomputer MC is rendered to be"L" so that it is commenced to detect whether or not the main capacitorin the flash circuit FL for the flash photography has been completed. Itis judged at step #102 whether or not the main capacitor has beencompletely charged through the judgment b the microcomputer MC withrespect to the signal applied to the input terminal CHS thereof. In thecase where the input terminal CHS is "H" at step #102, since the maincapacitor has been completely charged, the program flow proceeds to step#103 at which the charge completion is displayed by the chargecompletion display element CHC. Thereafter, at step #104, the chargecompletion detecting operation is released by resetting the outputterminal DSTA to be "H".

Unless the input terminal CHS is "H" at step #102, since the maincapacitor of the flash circuit FL has not been completely charged, theprogram flow proceeds to step #105 at which the output terminal DSTA ofthe microcomputer MC is rendered to be "H" so that the charge completiondetecting operation is released. Thereafter, the warning is executed bythe release lock warning element RLW at step #106 and a wait conditiontakes place until the light measuring switch S1 is turned off at step#107. When the light measuring switch S1 has been turned off at step#107, the program flow proceeds to the STOP routine as shown in FIG.21c.

On the other hand, the program flow proceeds from step #104 to step #110and at steps #110 and #111, a wait condition continues until the releaseswitch S2 is turned on in the state where the light measuring switch S1is kept on. Hereupon, in the case where the flash photography is notexecuted, the program flow directly proceeds to step #110 from step #98.

When the release switch S2 has been turned on at step #110, the programflow proceeds to step #112 so that the display caused by the chargecompletion display element CHC is turned off. Subsequently, it is judgedat step #113 if the flash photography is executed by judging whether ornot the flash flag FLF is set to "1". Hereupon, since the flash flag FLFis set to "1" in case of the flash photography, the program flowproceeds to step #114 at which the automatically control flash time FMTis allowed to execute the flash photography by causing the outputterminal FLEN of the microcomputer MC to be "L". In the case where theflash photography is not executed, since the flash flag FLF is not setto "1", the program flow proceeds to step #115 at which the outputterminal FLEN of the microcomputer MC is rendered to be "H" so that theflash photography is prohibited.

Thereafter, at step #116, the output terminal EXSTA is rendered to be"L" so that the photographing operation is initiated by the releasecircuit RLC, exposure control circuit AE and automatic focusing unit AF,and at step #117, the data corresponding to the value Sv of the filmsensitivity read by the film sensitivity reading circuit ISD is set inthe data printing period control timer contained in the microcomputerMC. The aforementioned timer starts at step #118 followed by step #119as shown in FIG. 21b.

The output terminal IPS of the microcomputer MC is rendered to be "L" atstep #119 so that the printing of the data is initiated by the dataprinting unit DAIP disposed on the back cover, or in the case where thepseudo focal length photographing mode is designated, the printing ofthe pseudo focal length photographing mark is initiated by the printingcircuit TRIP thereof. Then, at step #120, a wait condition takes placeuntil the counting is completed by the timer set at step #117 and whenthe counting has been completed, the program flow proceeds to step #121at which the output terminal IPS is rendered to be "H" to enable theprinting to be completed.

Subsequently, at step #122, the microcomputer MC is kept waiting untilthe output terminal AEC of the exposure control circuit AE which isrendered to be "L" in compliance with the commencement of the shutterclosing operation is turned to be "L", and when this output terminal AECis turned to be "L", the microcomputer MC is kept waiting during apredetermined period required for the closure of the shutter at step#123 followed by step #124. At step #124, the output terminal PWC of themicrocomputer MC is rendered to be "L" so that the transistor BT isbecomes non-conductive to stop the electric supply from the line (+V).

Furthermore, the output terminal AEL of the microcomputer MC is reset to"H" at step #125 to enable the releasement from the AE-lock and theoutput terminal EXSTA is reset to "H" at step #126 to enable the releasemagnet RM to be de-energized and the output terminal WSTA is rendered tobe "L" at step #127 so that the film is wound up by driving the filmwinding motor FWM in a direction required to complete the film winding.After the microcomputer MC has been kept waiting at step #128 during apredetermined period required for opening the one frame switch 1FS fromthe closed state thereof, the program flow proceeds to step #129 atwhich it is judged whether or not the one frame switch 1FS has beenturned on. Simultaneously with this procedure, it is judged by themicrocomputer MC at step #130 whether or not the overload detectingswitch OLS is turned on.

Upon detection of the closure of the one frame switch 1FS, since thefilm winding has been normally completed by one frame, the outputterminal WSTA is reset to "H" at step #131 to enable the film windingoperation to be released. At subsequent step #132, the microcomputer MCis kept waiting until the light measuring switch S1 is turned off andwhen the light measuring switch S1 has been turned off, it is judged atstep #133 whether or not the interruption terminal INT0 is applied withthe interruption signal. At this moment, if the interruption signal hasbeen inputted into the interruption terminal INT0, the program flowproceeds to the mode changing routine as shown in FIGS. 19a and 19b, andif the interruption signal has not been inputted, the program flowproceeds to step #134 at which it is judged if the interruption signalhas been applied to the interruption terminal INT1. When theinterruption signal has been applied to the interruption terminal INT1at step #134, the program flow proceeds to the back cover routine asshown in FIG. 20, and when the interruption signal has not beeninputted, the program flow proceeds to the STOP routine which startsfrom step #150.

When it has been judged at step #130 that the overload detecting switchOLS is kept on, this means that the film is tensioned and therefore, await condition takes place at step #140 which continues until the lightmeasuring switch S1 is turned off. When the light measuring switch S1has been turned off, the output terminal RWSTA of the microcomputer MCis rendered to be "L" at step #141 so that the film winding motor FWM isdriven in a direction required to rewind the film. Thereafter, themicrocomputer MC is kept waiting at step #142 until the film detectingswitch FIS is turned on, and since the film detecting switch FIS isturned on at the time of completion of the film rewinding, the programflow proceeds to step #143 at which the output terminal RWSTA of themicrocomputer MC is reset to "H" so that the rewinding operation of thefilm is completed.

Subsequently, it is judged at step #144 whether or not the interruptionsignal has been applied to the interruption terminal INT0, and when theinterruption signal has been inputted, the program flow proceeds to themode changing routine shown in FIGS. 19a and 19b. If the interruptionsignal has not been applied to the interruption terminal INT0, it isjudged at step #145 whether or not the interruption signal has beeninputted into the interruption terminal INT1. When the interruptionsignal has been inputted, the program flow proceeds to the back coverroutine as shown in FIG. 20. Unless the interruption signal has beeninputted at step #145, the program flow proceeds to the STOP routinewhich starts from step #150.

Lastly, the STOP routine will be explained hereinafter.

In the STOP routine, the output terminal PWC of the microcomputer MC isfirstly rendered to be "H" at step #150, thereby causing the transistorto be in non-conductive state in order to stop the electric supply fromthe line (+V). Then, the displays of the release lock warning elementRLW, charge completion display element CHC and close-up distance displayelement DW are turned off at step #151 and the output terminal AEL ofthe microcomputer MC is rendered to be "H" at step #152 so that theAE-lock caused by the exposure control circuit AE is released. At step#153, the interruption which is caused by the interruption signal fromeach of the interruption terminal INT0, INT1 and INT2 is permitted, andit is judged at step #154 whether or not the flash flag FLF is set to"1" for the flash photography.

Hereupon, although the operation is completed unless the flash flag FLFis set to "1", in the case where the flash flag FLF is set to "1", theoutput terminal FLSTA of the microcomputer MC is rendered to be "L" atstep #155 so that the voltage boosting for charging the main capacitorin the flash circuit FL is initiated, and at subsequent step #156, thecharge completion is detected by rendering the output terminal DSTA tobe "L". Then, at step #157, the output terminal CHS of the flash circuitFL is rendered to be "L" and a wait condition takes place until the maincapacitor is completely charged. When the main capacitor has beencompletely charged, the output terminal DSTA is rendered to be "H" atstep #158 to enable the charge completion detecting operation to bereleased, and the output terminal FLSTA is rendered to be "H" at step#159 to enable the voltage boosting operation to be released, thusresulting in the completion of a series of the operation.

It is to be noted here that although the range which can be reproducedon a print is restricted to one kind in the case where the pseudo focallength photographing mode is designated in this embodiment, the presentinvention is not limited thereby, but may be modified in such aconstruction that the range which can be reproduced on a print can beswitched to one of a plurality of the ranges so as to record plural bitsof the pseudo focal length photographing informations onto the film.

It is further to be noted that in the above described embodiment,although the switching of the focal lengths of the photographing lensand the fact whether or not the pseudo focal length photographing modeis designated are associated with each other, the present invention isnot limited thereby, but is applicable not only to the photographiccamera having the photographing lens of a fixed focal length, but alsoto the photographic camera which is not provided with the real focallength photographing mode but only the pseudo focal length photographingmode.

Although the present invention has been fully described by way ofexample with reference to the accompanying drawings, it is to be notedhere that various changes and modifications will be apparent to thoseskilled in the art. Therefore, unless otherwise such changes andmodifications depart from the scope of the present invention, theyshould be construed as being included therein.

What is claimed is:
 1. A photographic camera having a real focal lengthphotographing mode in which a normal range in a frame of a film will beprinted on the photographing paper and a pseudo focal lengthphotographing mode in which a range smaller than the normal range in aframe of the film will be printed on a photographic paper, saidphotographic camera comprising:a mode selecting means for selecting oneof said real focal length photographing mode and said pseudo focallength photographing mode; means for winding the film by an identicallength for every shot regardless of the selection of the photographingmode by said selecting means; and a light shielding means for shieldingat least a portion of the normal range in a frame of the film in thecase where said pseudo focal length photographing mode was selected,said portion being limited to a portion of said film which is not to beutilized upon printing.
 2. A photographic camera as claimed in claim 1,further comprising a recording means for recording an informationrelated to the selected mode within the range shielded by said lightshielding means.
 3. A photographic camera comprising:means for winding afilm by an additional length for every shot; and means for shielding atleast a portion of a normal range in a frame of the film, said portionbeing limited to a portion of the film which is not to be utilized uponprinting.
 4. A photographic camera as claimed in claim 3, wherein saidshielding means is adapted to shield the upper portion of the normalrange.
 5. A photographic camera as claimed in claim 3, wherein saidshielding means is adapted to shield the lower portion of the normalrange.
 6. A photographic camera comprising:means for shielding the upperportion of a normal range in a frame of a film, said portion beinglimited to a portion of the film which is not to be utilized uponprinting.
 7. A photographic camera comprising:means for shielding thelower portion of a normal range in a film, said portion being limited toa portion of the film which is not to be utilized upon printing.
 8. Aphotographic camera comprising:means for shielding at least a portion ofa normal range in a frame of a film; and means for imprinting data inthe shielded portion in response to the photographing operation.
 9. Aphotographic camera as claimed in claim 8, further comprising:means forswitching said imprinting means from active state to non-active state orfrom non-active state to active state.
 10. A photographic camera asclaimed in claim 9, wherein said switching means includes:means forselecting a real focal length photographing mode in which the normalrange in a frame of a film will be printed on a photographing paper anda pseudo focal length photographing mode in which a range smaller thanthe normal range in a frame of the film will be printed on aphotographing paper; means for allowing said imprinting means to imprintdata when said selecting means selectes the pseudo focal lengthphotographing mode, wherein data which said imprinting means imprintsrepresents that the pseudo focal length photographing mode is selected.